KR20020053159A - Process for producing a voidless electric insulating plate - Google Patents

Process for producing a voidless electric insulating plate Download PDF

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Publication number
KR20020053159A
KR20020053159A KR1020000082492A KR20000082492A KR20020053159A KR 20020053159 A KR20020053159 A KR 20020053159A KR 1020000082492 A KR1020000082492 A KR 1020000082492A KR 20000082492 A KR20000082492 A KR 20000082492A KR 20020053159 A KR20020053159 A KR 20020053159A
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South Korea
Prior art keywords
epoxy resin
manufacturing
vacuum
insulating plate
glass fiber
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KR1020000082492A
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Korean (ko)
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KR100382411B1 (en
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조인식
이동원
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조 정 래
주식회사 효성
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
    • B29C70/347—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation combined with compressing after the winding of lay-ups having a non-circular cross-section, e.g. flat spiral windings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2063/00—Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0094—Condition, form or state of moulded material or of the material to be shaped having particular viscosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
    • B29K2995/0007—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/002—Panels; Plates; Sheets

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

PURPOSE: A method for manufacturing an insulating board without air hole is provided to reduce cost and period of manufacturing as well as the scope of equipment by omitting a typical prepreg process. CONSTITUTION: The method for manufacturing an insulating board without air hole is comprised of steps of passing glass fiber textile fabrics(2) through an epoxy resin impregnation vessel(1) and winding it around two stainless rods(4,4') in a form of lamination board(3); and compressively heating the lamination board within a vacuum mold. The used epoxy resin has a viscosity of 50 to 500cp.

Description

기공이 없는 전기절연 판재의 제조방법{Process for producing a voidless electric insulating plate}Process for producing a voidless electric insulating plate

본 발명은 제조 공정을 줄여 투자비를 줄이고, 가동률을 높여 제조비용을 줄일 수 있는 기공이 없는 전기절연 판재의 제조방법에 관한 것이다.The present invention relates to a method of manufacturing a porous insulation-free plate that can reduce the manufacturing process to reduce the investment cost, increase the operating rate to reduce the manufacturing cost.

본 발명이 만들고자 하는 기공이 없는 전기절연 판재, 즉 에폭시 수지 함침 유리섬유 직물제 판재는 중전기기에 사용되는 절연로드(rod)로 가공하여 사용된다.The present invention is a pore-free electrically insulating plate, that is, epoxy resin impregnated glass fiber fabric plate is used by processing the insulating rod (rod) used in heavy electric machines.

중전기기에는 고전압이 걸리기 때문에 절연재료 속에 기공이 있게 되면 절연파괴가 발생하기 때문에 기공을 최대한 줄이기 위하여 진공 성형을 하게 된다.Since heavy electric machines are subject to high voltages, if there are pores in the insulating material, insulation breakdown occurs, and vacuum molding is performed to minimize the pores.

종래에는 에폭시를 코팅시킨 유리섬유 직물을 건조로에서 연속적으로 부분적으로 건조시켜 반건조 상태의 프리프레그 씨이트를 만들고, 이것을 여러장으로 필요로하는 두께로 쌓아 프레스로 가열 성형하여 판재형태로 제조하였다.Conventionally, a glass fiber fabric coated with epoxy is partially dried in a drying furnace to form a semi-dried prepreg sheet, which is stacked in several sheets and heat-molded with a press to produce a sheet.

그러나 이러한 방법은 설비 투자비가 많이 들고, 설비의 설치공간이 클 뿐만 아니라 실제 가동률이 낮아서 제조비용이 매우 높았었던 문제점이 있었다.However, this method has a problem that the manufacturing cost was very high because the facility investment cost, the installation space of the facility is large, and the actual operation rate is low.

전기절연 판재는 성형시킬 때 진공 상태에서 압착하지 않으면 기공이 남게 되는바, 진공하에서 성형한 것은 흡수율이 0.15중량% 이하임에 대하여 무진공 상태에서 프리프레그 가압 성형한 제품은 흡수율이 0.2중량% 이상인것으로 분석되었다.When the electrically insulating sheet is molded, pores remain if it is not pressed in a vacuum state. The molded product under vacuum has an absorption rate of 0.15 wt% or less, and the product preformed under pressure in a non-vacuum state has an absorption rate of 0.2 wt% or more. It was analyzed.

따라서 진공 상태에서 성형해야만 기공을 최저로 줄일 수 있다.Therefore, the molding can be reduced to the minimum by vacuum molding.

또한, 종래의 방법에서 프리프레그를 제조하는 공정은 건조 공정의 길이가 높이로 16~20미터의 공간을 필요로 하는 연속 생산라인으로 이루어져 있어서 가동률이 낮을 경우 제조경비가 제품에 많은 영향을 주고 있다.In addition, the process of manufacturing the prepreg in the conventional method consists of a continuous production line that requires a space of 16 to 20 meters in length of the drying process has a large impact on the production cost when the operation rate is low .

본 발명은 흡수율이 0.15중량% 이하로서 기공이 없는 전기절연판재를 넓은 공간을 점유하지 않고 경제적으로 제조할 수 있는 방법을 제공하는데 기술적 과제를 두고 있다.The present invention has a technical problem to provide a method for economically manufacturing an electrical insulating plate material having no water absorption of 0.15% by weight or less without occupying a large space.

또 본 발명은 안정된 성형 조건을 얻기 위하여 진공 성형장치에 조립한 상태에서의 고정용 스테인레스봉 사이의 상하로 분리된 유리섬유 직물들을 하나로 합치고 평평하게 유지하기 위한 텐션을 부여하는 방법을 제공하는데 있다.In another aspect, the present invention is to provide a method for providing a tension for combining the glass fiber fabrics separated up and down between the fixing stainless rods in a state of assembly in a vacuum forming apparatus in order to obtain a stable molding conditions and to keep flat.

도 1은 본 발명에서 에폭시 수지를 함침한 유리섬유 직물을 성형코자 하는 판재의 두께로 감아주는 과정을 보여주고 있는 설명도.1 is an explanatory diagram showing a process of winding the glass fiber fabric impregnated with an epoxy resin to the thickness of the plate to be molded in the present invention.

도 2는 본 발명에서 판재로 성형할 에폭시 수지 함침 유리섬유 직물의 권취물을 진공프레스로 성형시키는 상태를 보인 정면도이다.Figure 2 is a front view showing a state in which the wound of the epoxy resin impregnated glass fiber fabric to be molded into a plate in the present invention by molding in a vacuum press.

본 발명을 도면에 의하여 상세히 설명하면 다음과 같다.The present invention will be described in detail with reference to the drawings.

도 1은 에폭시수지 함침조(1)에 유리섬유직물(2)을 함침시킨 후 두개의 스테인레즈봉(4)(4')에 적층판(3)의 형태로 권취하는 과정을 보이고 있다.FIG. 1 shows a process of winding an impregnated glass fiber fabric 2 into an epoxy resin impregnation tank 1 and then winding the two stainless steel rods 4, 4 ′ in the form of a laminate 3.

도 2는 상기 적층판(3)을 진공성형틀(5) 내에 있는 성형틀(6)에 끼운 다음에 히터가 장착된 상, 하 압착열판(7)(7')으로 압착시켜서 전기절연 판재로 성형하는 과정을 보이고 있다.FIG. 2 shows that the laminated plate 3 is inserted into a molding die 6 in the vacuum forming mold 5 and then pressed into upper and lower pressing heat plates 7 and 7 'equipped with a heater to form an electrically insulating plate. Is showing the process.

도 2에서 상부 압착열판(7)은 두개의 유압실린더(8)(8')에 의하여 상, 하로 운동할 수 있도록 되어 있고, 진공성형틀(5)은 배기관(9)에 의하여 내부를 진공으로 만들 수 있다.In FIG. 2, the upper pressing plate 7 is able to move up and down by two hydraulic cylinders 8 and 8 ', and the vacuum forming frame 5 is evacuated by the exhaust pipe 9 into a vacuum. I can make it.

본 발명에 사용되는 진공성형틀(5)은 통상의 유압프레스에 쉽게 끼워 넣고 상부고정판(10)을 유압프레스의 상부프레임에 고정하기만 하면 쉽게 사용할 수 있도록 설계되어 있다.The vacuum molding frame 5 used in the present invention is designed to be easily used by simply inserting it into a conventional hydraulic press and fixing the upper fixing plate 10 to the upper frame of the hydraulic press.

본 발명에서는 점성이 적어서 함침이 잘 될 수 있는 에폭시수지를 사용하며, 수지점도가 50 ∼ 500cP의 것을 사용한다.In the present invention, the epoxy resin which can be impregnated well due to the low viscosity is used, and a resin having a viscosity of 50 to 500 cP is used.

또 본 발명에서 적층판(3)에 함침되어 있는 수지 함량은 30중량% 정도가 되게 하여서 진공성형시킬 때 수지의 낭비가 최소화 되도록 하였다.In addition, in the present invention, the resin content impregnated in the laminate 3 is about 30% by weight to minimize the waste of the resin when vacuum forming.

흡수율의 측정 방법Measurement method of water absorption

적층판의 두께는 그대로 하고 길이, 폭을 각각 50mm로 자른 것을 시험편으로 하고, 그 절단면을 사포로 매끄럽게 한다.The thickness of the laminated board is left as it is, and the test piece is cut into 50 mm in length and width, respectively, and the cut surface is smoothed with sandpaper.

이것을 50℃의 항온용기에서 24시간 건조한 후 데시케이트 안에서 실온까지 냉각하여 그 시험편의 무게를 1mg 까지 정확하게 측정한다.It is dried for 24 hours in a constant temperature container at 50 ° C, cooled to room temperature in a desiccator, and the weight of the specimen is accurately measured to 1 mg.

다음으로 물을 넣은 용기중에 24시간 담근 후 꺼내어 깨긋한 헝겁 등으로 닦은 후 1분이내에 그 시험편의 질량을 1mg 까지 정확하게 측정하여 다음 식에 따라 흡수율을 산출한다.Next, immerse in a container with water for 24 hours, take it out, wipe with a clean cloth, etc., and then accurately measure the mass of the specimen to 1 mg within 1 minute, and calculate the absorption rate according to the following equation.

흡수율(중량%)={(흡수전의 시편무게-흡수후의 시편무게)/흡수전 시편무게}×100Absorption rate (% by weight) = {(Weight of specimen before absorption-specimen weight after absorption) / specimen weight before absorption} × 100

실시예 1 ∼ 6Examples 1-6

표 1에서 에폭시 수지 및 경화제 타입을 라미네이트용 및 필라멘트 와인딩용 등 여러가지를 사용하여 비교하였다.In Table 1, epoxy resins and curing agent types were compared using various methods such as laminates and filament windings.

도 1의 장치를 이용하여 에폭시 수지를 유리섬유 직물에 함침시킨 후 적층판의 형태로 권취하고 적층판의 중량을 측정하여 에폭시 수지 함량을 분석하였다.The epoxy resin was impregnated into the glass fiber fabric using the apparatus of FIG. 1 and then wound in the form of a laminate, and the weight of the laminate was measured to analyze the epoxy resin content.

도 2의 진공 성형틀에 적층판을 장착하여 진공을 먼저 걸어 수지중의 기포를 제거하고 이후에 진공상태에서 가열 프레싱하였다.A laminate was mounted on the vacuum forming mold of FIG. 2 to apply a vacuum first to remove bubbles in the resin, and then to heat press in a vacuum.

진공압은 15mmbar 이하로 유지하며, 프레스의 설정 온도는 120℃로 하여, 2시간 성형하고, 이후 150℃에서 2시간 동안 후경화를 시켰다.The vacuum pressure was maintained at 15 mmbar or less, and the press was set at 120 ° C. for 2 hours, and then post-cured at 150 ° C. for 2 hours.

이렇게 하여 제조된 판재를 가공하여 흡수율을 측정하고 비교하였다.The plate thus produced was processed to measure and compare the absorbance.

< 표 1 ><Table 1>

구분division 실시예 1Example 1 실시예 2Example 2 실시예 3Example 3 실시예 4Example 4 실시예 5Example 5 실시예 6Example 6 에폭시 수지 종류Epoxy resin type A 형A type B 형Type B C 형C type D 형D type C 형C type B 형Type B 수지 함침조 온도Resin impregnation tank temperature 상온Room temperature 상온Room temperature 상온Room temperature 70℃70 ℃ 70℃70 ℃ 50℃50 ℃ 함침시 점도(cP)Viscosity at Impregnation (cP) 8080 500500 1,8001,800 350350 440440 250250 함침 에폭시 함량(중량%)Impregnated epoxy content (% by weight) 32.432.4 38.238.2 45.845.8 36.136.1 35.935.9 34.534.5 성형후 에폭시함량(중량%)Epoxy content after molding (wt%) 27.1~29.527.1 ~ 29.5 29.4~32.829.4-32.8 40.1~42.940.1 ~ 42.9 28.8~32.528.8-32.5 28.0~32.428.0 ~ 32.4 28.7~31.528.7-31.5 흡수율(중량%)Absorption rate (% by weight) 0.07~0.120.07-0.12 0.13~0.180.13 ~ 0.18 0.25~0.410.25-0.41 0.08~0.160.08 ~ 0.16 0.08~0.150.08 ~ 0.15 0.08~0.150.08 ~ 0.15

본 발명은 프리프레그 씨이트의 성형공정을 생략하였으므로 투자비를 대폭 절감할 수 있으며, 설비 가동시간적인 측면에서 성형 프레스에서 통상 2시간 정도 경화를 시켜는 동안에 에폭시 함침 적층판을 만드는 공정을 연속하여 진행할 수 있기 때문에 설비의 가동시간을 효율적으로 운영할 수 있다.In the present invention, since the prepreg sheet molding process is omitted, the investment cost can be greatly reduced, and the process of making epoxy-impregnated laminates can be continuously performed during curing for about 2 hours in the molding press in terms of equipment operation time. As a result, the uptime of the equipment can be efficiently operated.

또한 본 발명은 반경화 혹은 반건조 상태의 프리프레그가 아닌 에폭시 수지 코팅액이 액상인 상태에서 가압하기 때문에 프리프레그를 가압할 때와 비교하여 적은 프레스 압력으로도 성형이 가능하기 때문에 설비 투자비가 적게 든다.In addition, the present invention requires less equipment investment cost because molding is possible at a lower press pressure than when the prepreg is pressurized because the epoxy resin coating liquid is pressurized in a liquid state rather than a semipre-dried or semi-dry prepreg. .

또 본 발명은 에폭시 수지 점도가 50~ 500cP 정도로 낮은 것을 사용하므로 유리섬유 직물에 얇게 코팅할 수 있고, 그 결과 프리프레그 방식에서 가압할 때 성형품 밖으로 빠져나가게 되는 에폭시수지의 과량분을 줄일 수 있기 때문에 재료비의 절감이 가능하여 졌다.In addition, since the present invention uses an epoxy resin having a viscosity of about 50 to 500 cP, it is possible to thinly coat the glass fiber fabric, and as a result, it is possible to reduce the excessive amount of the epoxy resin that is drawn out of the molded article when pressed in the prepreg method. Material costs can be reduced.

Claims (2)

기공이 없는 전기절연 판재를 제조함에 있어서, 유리섬유직물 을 에폭시 수지 함침조에 통과시켜서 적층판의 형태로 권취하는 공정과, 상기 적층판을 진공성형틀 내에서 진공상태로 가열압착 성형하는 것을 특징으로 하는 기공이 없는 전기절연 판재의 제조방법.In manufacturing the electric insulation plate material free of pores, the step of winding the glass fiber fabric through the epoxy resin impregnation tank in the form of a laminated plate, the pores characterized in that the hot-pressed molding the laminated plate in a vacuum mold in a vacuum mold Method of manufacturing a non-electrically insulating plate without a material. 제 1 항에서, 점도가 50 ~ 500cP인 에폭시 수지를 사용함을 특징으로 하는 기공이 없는 전기절연 판재의 제조방법.[2] The method of claim 1, wherein an epoxy resin having a viscosity of 50 to 500 cP is used.
KR10-2000-0082492A 2000-12-27 2000-12-27 Process for producing a voidless electric insulating plate KR100382411B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100737279B1 (en) * 2006-02-22 2007-07-09 (주) 한국절연물산 Method for preparing glass-fiber insulating rod coated with epoxy and glass-fiber insulating rod using the method

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* Cited by examiner, † Cited by third party
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JPS61160209A (en) * 1985-01-09 1986-07-19 Nitto Boseki Co Ltd Preparation of glass fiber cloth prepreg
JPS6381006A (en) * 1986-09-25 1988-04-11 Matsushita Electric Works Ltd Preparation of smc
JPH0911233A (en) * 1995-06-29 1997-01-14 Matsushita Electric Works Ltd Production of smc
KR100266938B1 (en) * 1997-03-08 2000-10-02 포만 제프리 엘 Water-based thermosetting resin emulsions for electronic devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100737279B1 (en) * 2006-02-22 2007-07-09 (주) 한국절연물산 Method for preparing glass-fiber insulating rod coated with epoxy and glass-fiber insulating rod using the method

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